From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
40/50 suspension system, specifically rear spring alterations and buffer clearance.
| Identifier | ExFiles\Box 67a\2\ scan0083 | |
| Date | 23th December 1927 | |
| To Hm.{Capt. W. Hallam - Head Repairs} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X8440 Hs{Lord Ernest Hives - Chair}/RmL/LG23.12.27. 40/50 SUSPENSION. X8410 [crossed out] X4117 With reference to Hm{Capt. W. Hallam - Head Repairs}/NRC{N. R. Chandler}9/MW19.12.27. We think the information given herein is exceptionally useful in that it will enable anyone who is investigating springing complaints to determine whether there is any material prospect of removing the complaint by altering the rear springs. The results agree very closely with our experimental experience but we do not think that a buffer clearance of less than 3" should ever be employed with the normal load. We recommend that a paragraph should be inserted to indicate that the internal spring friction has a considerable bearing on the effect produced and that therefore the condition of the springs should be carefully considered when using this information. Naturally the known habits of the customer must dictate whether a buffer clearance of less than 4" can be employed successfully. Our own impression is that we can obtain quite good riding with 4" buffer clearance in almost all cases, and that therefore weaker springs than this maximum [crossed out] should only be utilised in exceptional cases. Rm.{William Robotham - Chief Engineer} | ||